Mini-Sewi KNX TH-L-Pr - KNX Presence, Brightness and Ambient Climate Sensor
  • 00431 05 3
  • 70680whi
  • 00431 3
  • 00429 2
ELSNER 70403

Mini-Sewi KNX TH-L-Pr - KNX Presence, Brightness and Ambient Climate Sensor

Product code: 70403
The Sensor Mini-Sewi KNX TH-L-Pr for the KNX building bus system captures brightness and the presence of persons in rooms. It also measures the temperature and the air humidity and calculates the dew-point. Via the bus, the indoor sensor can receive external values of temperature and humidity and process them further with its own data to a total value (mixed value, e.g. room average). Integrated PI-controllers control ventilation (humidification/dehumidification according to humidity) and heating/cooling (according to temperature).

The Sensor Mini-Sewi KNX TH-L-Pr can output a warning to the bus as soon as the comfort field, as per DIN 1946, is left. Actuating variable comparators can compare and output variables that were received via communication objects.

All measurement values can be used for the control of limit-dependent switching outputs. States can be linked via AND logic gates and OR logic gates.

Price (Excluding GST)


  • Brightness measurement with brightness control
  • Presence of persons is detected
  • Threshold values can be adjusted per parameter or via communication objects
  • 4 AND and 4 OR logic gates, each with 4 inputs. All switching events as well as 16 logic inputs (in the form of communications objects) can be used as inputs for the logic gates. The output of each gate can be configured optionally as 1-bit or 2 x 8-bit
  • Configuration is made using the KNX software ETS.
  • Measuring the temperature and air humidity (relative, absolute), each with mixed value calculation. The share of internal measurement value and external value can be set as a percentage
  • Bus message, whether the values for temperature and air humidity are within the comfort field (DIN 1946). Dew point calculation
  • PI-controller for heating (one or two-stage) and cooling (one or twostage) according to temperature. Regulation according to separate setpoints or basic setpoint temperature
  • PI controller for humidity according to humidity: Ventilate/Air (one-stage) or Ventilate (one or two-stage)
  • 2 actuation variable comparators to output minimum, maximum or average values. 5 inputs each for values received via communication objects

Technical Details



Housing: Plastic
Colour: White matt
Assembly: Surface, ceiling installation
Dimensions Ø x height: approx. 51 mm x approx. 19 mm
Degree of protection: IP 30
Weight: approx. 20 g
Ambient temperature: -20…+60°C
Ambient humidity: 5...95% RH, non-condensing
Storage temperature: -30…+70°C

KNX bus

KNX medium: TP1-256
Configuration mode: S-Mode
Group addresses: max. 254
Assignments: max. 254
Communication objects: 252
Nominal voltage KNX: 30 V DC SELV
Power consumption KNX: max. 10 mA
Connection: KNX plug terminals
Duration after bus voltage restoration until data is received: approx. 5 seconds

Brightness sensor

Measurement range: 0 lux … 2,000 lux (higher values can be measured and output)
Resolution: 1 lux at 0…2,000 lux

Presence sensor

Coverage angle: approx. 94° × 82° (see also Coverage area of the presence detector)
Range: approx. 5 m

Temperature sensor

Measurement range: -20°C … +60°C
Resolution: 0.1°C

Humidity sensor

Measurement range: 0% rH … 100% rH
Resolution: 0.1% rH



Technology KNX
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